scholarly journals A revision and phylogenetic analysis of the millipede genus Oxidus Cook, 1911 (Polydesmida, Paradoxosomatidae)

2017 ◽  
Author(s):  
Anh D. Nguyen ◽  
Zoltán Korsós ◽  
Kuem-Hee Jang ◽  
Ui-Wook Hwang
Keyword(s):  
Sister Group ◽  
Mitochondrial Genes ◽  
Ryukyu Islands ◽  
Key To Species ◽  
Tropical Regions ◽  
Fresh Material ◽  
The Ryukyu Islands ◽  
Species Inquirenda ◽  
The World ◽  
The Status

The genus Oxidus Cook, 1911 is revised to contain five species, O. avia (Verhoeff, 1937), O. gigas (Attems, 1953), O. gracilis (C.L. Koch, 1847), O. riukiaria (Verhoeff, 1940), and “species inquirenda” O. obtusus (Takakuwa, 1942). A cosmopolitan species, O. gracilis, is widely found in temperate and sub-tropical regions over the world, but other species have limited distribution in restricted regions, e.g., O. gigas in northern Vietnam, O. riukiaria and O. avia in the Ryukyu Islands (Japan). Four species, O. gracilis, O. riukiaria, O. avia and O. gigas, are confirmed as different from each other in gonopod characters, coloration and body size. The status of the last species, O. obtusus, is still doubtful and requires examination of further fresh material. The phylogenetic relationships among species of Oxidus is analyzed using two fragments of the mitochondrial genes COI (Cytochrome c Oxidase subunit I) and 16S rRNA. Three species of Oxidus are clearly separated from each other; O. gigas and O. gracilis form a monophyletic sister group with O. riukiaria. The genus Oxidus is also monophyletic and more closely related to the genus Tylopus Jeekel, 1968 than to the genera Sellanucheza Enghoff, Golovatch & Nguyen, 2004 or Kronopolites Attems, 1914. In addition, an identification key to species of Oxidus is provided.

Spatial distribution of chaetodontid fish in coral reefs of the Ryukyu Islands, southern Japan

1999 ◽  
Vol 79 (4) ◽  
pp. 725-735 ◽  
Author(s):  
L. Cadoret ◽  
M. Adjeroud ◽  
M. Tsuchiya
Keyword(s):  
Species Richness ◽  
Coral Reefs ◽  
Reef Slope ◽  
Data Matrix ◽  
Ryukyu Islands ◽  
Southern Japan ◽  
The Ryukyu Islands ◽  
The World ◽  
Species Richness And Abundance ◽  
Reef Edge

The spatial patterns of butterflyfish assemblages (Chaetodontidae) were examined within and between five islands of the Ryukyu Archipelago, southern Japan. Despite being the northernmost reef communities in the world and despite the severe natural and human-induced disturbances that have affected them since the 1970s, the coral reefs of the Ryukyu Islands have one of the most diversified assemblages of chaetodontids in the world. A total of 30 species were identified, and species richness per island ranged from 20 to 25 species. On each of the 45 stations prospected, between four and 17 species were recorded, and between 0.75 and 21.75 ind 250 m−2 were counted. Variation in species composition, species richness and abundance between islands was less pronounced than the variation within islands, where assemblages of the major reef environments (i.e. the reef flat, the reef edge, and the reef slope) were distinguished. The highest species richness and abundance were found on the reef slope and the reef edge. Canonical correspondence analysis revealed that depth, substrate complexity, and live coral cover influenced the distribution of chaetodontid fishes. These factors accounted for 20% of the variation in the species data matrix.

scholarly journals Marine biodiversity research in the Ryukyu Islands, Japan: Current status and trends

2019 ◽  
Author(s):  
James D Reimer ◽  
Piera Biondi ◽  
Yee Wah Lau ◽  
Giovanni Masucci ◽  
Xuan Hoa Nguyen ◽  
...  
Keyword(s):  
Coral Reef ◽  
Current Status ◽  
Marine Biodiversity ◽  
Human Populations ◽  
Ryukyu Islands ◽  
Marine Research ◽  
Biodiversity Research ◽  
Rate Of Increase ◽  
The Ryukyu Islands ◽  
The World

In Japan, the subtropical Ryukyu Archipelago (RYS; also known as the Nansei Islands) with its coral reefs has been shown to harbor very high levels of marine biodiversity. This study provides an overview of the state of marine biodiversity research in the RYS. First, we examined the amount of scientific literature in the Web of Science (WoS; 1995-2017) on six selected representative taxa spanning from protists to vertebrates across six geographic sub-regions in the RYS. Our results show clear taxonomic and sub-region bias, with research on Pisces, Cnidaria, and Crustacea to be much more common than on Dinoflagellata, Echinodermata, and Mollusca. Such research was more commonly conducted in sub-regions with larger human populations (Okinawa, Yaeyama). Additional analyses with the Ocean Biogeographic Information System (OBIS) records show that within sub-regions, records are concentrated in areas directly around marine research stations and institutes (if present), further showing geographical bias within sub-regions. While not surprising, the results indicate the clear need to study ‘understudied’ taxa in ‘understudied sub-regions’ (Tokara, Miyako, Yakutane, Amami Oshima), and to study ‘understudied areas’ of some sub-regions away from marine research stations. Second, we compared the numbers of scientific papers on eight ecological topics for the RYS with numbers from selected major coral reef regions of the world; the Caribbean (CAB), Great Barrier Reef (GBR), and the Red Sea (RES). Not unexpectedly, the numbers for all topics in the RYS were well below numbers from all other regions, yet within this disparity, research in the RYS on ‘marine protected areas’ and ‘herbivory’ was an order of magnitude lower than numbers in other regions. Additionally, while manuscript numbers on the RYS have increased from 1995 to 2016, the rate of increase (4.0 times) was seen to be lower than those in the CAB, RES, and GBR (4.6 to 8.4 times). As the RYS are considered to contain among the most critically endangered coral reef biodiversity in the world due to high levels of both endemism and anthropogenic threats, much work is urgently needed to address the areas of relative research weakness identified in this study.

scholarly journals Marine biodiversity research in the Ryukyu Islands, Japan: Current status and trends

2019 ◽  
Author(s):  
James D Reimer ◽  
Piera Biondi ◽  
Yee Wah Lau ◽  
Giovanni Masucci ◽  
Xuan Hoa Nguyen ◽  
...  
Keyword(s):  
Coral Reef ◽  
Current Status ◽  
Marine Biodiversity ◽  
Human Populations ◽  
Ryukyu Islands ◽  
Marine Research ◽  
Biodiversity Research ◽  
Rate Of Increase ◽  
The Ryukyu Islands ◽  
The World

In Japan, the subtropical Ryukyu Archipelago (RYS; also known as the Nansei Islands) with its coral reefs has been shown to harbor very high levels of marine biodiversity. This study provides an overview of the state of marine biodiversity research in the RYS. First, we examined the amount of scientific literature in the Web of Science (WoS; 1995-2017) on six selected representative taxa spanning from protists to vertebrates across six geographic sub-regions in the RYS. Our results show clear taxonomic and sub-region bias, with research on Pisces, Cnidaria, and Crustacea to be much more common than on Dinoflagellata, Echinodermata, and Mollusca. Such research was more commonly conducted in sub-regions with larger human populations (Okinawa, Yaeyama). Additional analyses with the Ocean Biogeographic Information System (OBIS) records show that within sub-regions, records are concentrated in areas directly around marine research stations and institutes (if present), further showing geographical bias within sub-regions. While not surprising, the results indicate the clear need to study ‘understudied’ taxa in ‘understudied sub-regions’ (Tokara, Miyako, Yakutane, Amami Oshima), and to study ‘understudied areas’ of some sub-regions away from marine research stations. Second, we compared the numbers of scientific papers on eight ecological topics for the RYS with numbers from selected major coral reef regions of the world; the Caribbean (CAB), Great Barrier Reef (GBR), and the Red Sea (RES). Not unexpectedly, the numbers for all topics in the RYS were well below numbers from all other regions, yet within this disparity, research in the RYS on ‘marine protected areas’ and ‘herbivory’ was an order of magnitude lower than numbers in other regions. Additionally, while manuscript numbers on the RYS have increased from 1995 to 2016, the rate of increase (4.0 times) was seen to be lower than those in the CAB, RES, and GBR (4.6 to 8.4 times). As the RYS are considered to contain among the most critically endangered coral reef biodiversity in the world due to high levels of both endemism and anthropogenic threats, much work is urgently needed to address the areas of relative research weakness identified in this study.

scholarly journals Marine biodiversity research in the Ryukyu Islands, Japan: Current status and trends

2018 ◽  
Author(s):  
James D Reimer ◽  
Piera Biondi ◽  
Yee Wah Lau ◽  
Giovanni Masucci ◽  
Xuan Hoa Nguyen ◽  
...  
Keyword(s):  
Coral Reef ◽  
Current Status ◽  
Marine Biodiversity ◽  
Human Populations ◽  
Ryukyu Islands ◽  
Marine Research ◽  
Biodiversity Research ◽  
Rate Of Increase ◽  
The Ryukyu Islands ◽  
The World

In Japan, the subtropical Ryukyu Archipelago (RYS; also known as the Nansei Islands) with its coral reefs has been shown to harbor very high levels of marine biodiversity. This study provides an overview of the state of marine biodiversity research in the RYS. First, we examined the amount of scientific literature in the Web of Science (WoS; 1995-2017) on six selected representative taxa spanning from protists to vertebrates across six geographic sub-regions in the RYS. Our results show clear taxonomic and sub-region bias, with research on Pisces, Cnidaria, and Crustacea to be much more common than on Dinoflagellata, Echinodermata, and Mollusca. Such research was more commonly conducted in sub-regions with larger human populations (Okinawa, Yaeyama). Additional analyses with the Ocean Biogeographic Information System (OBIS) records show that within sub-regions, records are concentrated in areas directly around marine research stations and institutes (if present), further showing geographical bias within sub-regions. While not surprising, the results indicate the clear need to study ‘understudied’ taxa in ‘understudied sub-regions’ (Tokara, Miyako, Yakutane, Amami Oshima), and to study ‘understudied areas’ of some sub-regions away from marine research stations. Second, we compared the numbers of scientific papers on eight ecological topics for the RYS with numbers from selected major coral reef regions of the world; the Caribbean (CAB), Great Barrier Reef (GBR), and the Red Sea (RES). Not unexpectedly, the numbers for all topics in the RYS were well below numbers from all other regions, yet within this disparity, research in the RYS on ‘marine protected areas’ and ‘herbivory’ was an order of magnitude lower than numbers in other regions. Additionally, while manuscript numbers on the RYS have increased from 1995 to 2016, the rate of increase (4.0 times) was seen to be lower than those in the CAB, RES, and GBR (4.6 to 8.4 times). As the RYS are considered to contain among the most critically endangered coral reef biodiversity in the world due to high levels of both endemism and anthropogenic threats, much work is urgently needed to address the areas of relative research weakness identified in this study.

scholarly journals Revision of Japanese species of Nipponomyia Alexander, 1924 (Diptera, Pediciidae)

ZooKeys ◽  
2020 ◽  
Vol 1000 ◽  
pp. 71-105
Author(s):  
Levente-Péter Kolcsár ◽  
Daichi Kato ◽  
Maribet Gamboa ◽  
Kozo Watanabe
Keyword(s):  
New Species ◽  
Ryukyu Islands ◽  
Dna Barcodes ◽  
Japanese Species ◽  
World Species ◽  
Male And Female ◽  
Distribution Maps ◽  
The Ryukyu Islands ◽  
The World ◽  
Two New Species

Japanese species of the genus Nipponomyia Alexander, 1924 are revised. Two new species, Nipponomyia okinawensis Kolcsár & Kato, sp. nov. and N. yakushimensis Kolcsár & Kato, sp. nov. are described from the Ryukyu Islands. Images of habitus and wings, illustrations of male and female terminalia, and distribution maps are provided for the Japanese species. A key to the world species of Nipponomyia is added. DNA barcodes of three Japanese Nipponomyia are provided, representing the first barcodes from the genus.

Impact of Social Media on English Language: A Review

2015 ◽  
Vol 3 (3) ◽  
pp. 5
Author(s):  
Dr. Neha Sharma
Keyword(s):  
Social Media ◽  
Cultural Values ◽  
English Language ◽  
Major Influence ◽  
International Level ◽  
Class Society ◽  
The World ◽  
The Status ◽  
The Media ◽  
Subsequent Rise

Language being a potent vehicle of transmitting cultural values, norms and beliefs remains a central factor in determining the status of any nation. India is a multilingual country which tends to encourage people to use English at national and international level. Basically English in India owes its presence to the British but its subsequent rise is not fully attributable to the British. It has now become the language of wider communication which is now spoken by large number of people all over the world. It is influenced by many factors such as class, society, developments in science and technology etc. However the major influence on English language is and has been the media.

MANAGING INFORMATION TECHNOLOGY APPLICATION IN TEACHING AT HIGH SCHOOLS IN VINH YEN CITY, VINH PHUC PROVINCE MEETS INDUSTRIAL REVOLUTION 4.0

2018 ◽  
Author(s):  
Vu Kha Thap
Keyword(s):  
Information Technology ◽  
Social Life ◽  
Industrial Revolution ◽  
Strong Impact ◽  
Surface Strength ◽  
Technology Application ◽  
Management Measures ◽  
The World ◽  
The Status ◽  
Information Technology Application

Entering the XXI century and especially in the period of the industrial revolution has entered the era of IT with the knowledge economy in the trend of globalization. The 4.0 mankind development of ICT, especially the Internet has had a strong impact and make changes to all activities profound social life of every country in the world. Through surveys in six high School, interviewed 85 managers and teachers on the status of the management of information technology application in teaching, author of the article used the SWOT method to distribute surface strength, weaknesses, opportunities and challenges from which to export 7 management measures consistent with reality. 7 measures have been conducting trials and the results showed that 07 measures of necessary and feasible.

FAMILY TRADITIONS: REFLECTION OF SOME FAMILY TRADITIONS IN THE LINGUISTIC PICTURE OF THE WORLD (ON THE BASIS OF ENGLISH AND UZBEK PROVERBS AND IDIOMS)

2020 ◽  
Vol 1 (3) ◽  
pp. 49-56
Author(s):  
Feruza Mamatova ◽  
Keyword(s):  
Cross Cultural ◽  
Cultural Communication ◽  
Cross Cultural Communication ◽  
The World ◽  
Marriage Partner ◽  
The Status ◽  
The Subject

The present paper aims to compare the principles of choosing a marriage partner and analyse the status of being in the marrriage in the frame of family traditions that are totally inherent to the both of the nations: English and Uzbek. It is known that interconnection and cross-cultural communication between the countries of these two nationalities have been recently developed. The purpose to give an idea about these types of family traditions and prevent any misunderstanding that might occur in the communications makes our investigation topical one. The research used phraseological units as an object and the marriage aspects as the subject

EMPOWERING WOMEN THROUGH ENTREPRENEURSHIP: ASPECTS AND APPROACHES

2014 ◽  
Vol 6 (01) ◽  
Author(s):  
JAVED ALAM SHEIKH
Keyword(s):  
Economic Development ◽  
Developed Countries ◽  
Substantial Contribution ◽  
Economic Empowerment ◽  
World Population ◽  
Least Developed Countries ◽  
The Road ◽  
Road Map ◽  
The World ◽  
The Status

Almost 50 per cent of the world population is constituted by the women and they have been making substantial contribution to socio-economic development. But, unfortunately their tremendous contribution remains unrecognized and unnoticed in most of the developing and least developed countries causing the problem of poverty among them. Empowering women has become the key element in the development of an economy. With women moving forward, the family moves, the village moves and the nation moves. Hence, improving the status of women by way of their economic empowerment is highly called for. Entrepreneurship is a key tool for the economic empowerment of women around the world for alleviating poverty. Entrepreneurship is now widely recognized as a tool of economic development in India also. In this paper I have tried to discuss the reasons and role of Women Entrepreneurship with the help of Push and Pull factors. In the last I have also discussed the problems and the road map of Women Entrepreneurs development in India.

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